﻿#region LICENSE

// This software is licensed under the New BSD License.
//
// Copyright (c) 2008-2014, Hiroaki SHIBUKI
// All rights reserved.
//
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// * Neither the name of Hiroaki SHIBUKI nor the names of its contributors may be
//   used to endorse or promote products derived from this software without specific
//   prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

#endregion

using System;

namespace Mjollnir
{
    /// <summary>
    /// EventHandler を拡張するための静的メソッドを提供します。
    /// </summary>
    public static class EventHandlerExtensions
    {
        /// <summary>
        /// 指定されたイベントを発火します。
        /// </summary>
        /// <param name="source">発火するイベントを表す EventHandler。</param>
        /// <param name="sender">イベントのソース。</param>
        public static void Fire(this EventHandler source, object sender)
        {
            if (sender == null) throw new ArgumentNullException("sender");

            if (source != null)
            {
                source(sender, new EventArgs());
            }
        }

        /// <summary>
        /// 指定されたイベントを発火します。
        /// </summary>
        /// <typeparam name="TEventArgs">イベントデータの型。</typeparam>
        /// <param name="eventHandler">発火するイベントを表す EventHandler。</param>
        /// <param name="sender">イベントのソース。</param>
        /// <param name="eventArgs">イベントデータを表す EventArgs&lt;T&gt;。</param>
        public static void Fire<TEventArgs>(this EventHandler<TEventArgs> source, object sender, TEventArgs eventArgs) where TEventArgs : EventArgs
        {
            if (source == null) throw new ArgumentNullException("source");
            if (eventArgs == null) throw new ArgumentNullException("eventArgs");

            if (source != null)
            {
                source(sender, eventArgs);
            }
        }
    }
}
